A friend currently has Covid. He’s had it multiple times. He says each time the symptoms he found most…

A friend currently has Covid. He’s had it multiple times. He says each time the symptoms he found most disturbing were feelings of impending doom, darkness and depression. What’s behind that, do we know @ejustin46, @DavidJoffe64? Probably in one of your posts that I missed.

Thanks for the many suggestions here. David and Emmanuel shared the science of what’s likely happening, well worth peoples’ time reading.